On Fri, Aug 06, 2004 at 07:28:38PM -0500, sandra ruiz wrote:
> in the docummentation about the planer it says:
>
> "It first combines all possible ways of scanning and joining the relations
> that appear in a query"
>
> I would like to know if there's a time limit to do that or if it just scans
> ALL the posibilities until it finishes..no matter the time it takes..
Depends; if you join a lot of tables, it stops doing an exhaustive search and
goes for genetic optimization instead:
http://www.postgresql.org/docs/7.4/static/geqo.html
/* Steinar */
--
Homepage: http://www.sesse.net/